Can opener



' M. HACKLNDER CAN "OPENER Filed July '7. 19:55

.wlilllllllll Feb. 26 1935.

Patented Feb. 26, 1935 UNITED .STATI-:sl

CAN OPENER Maximilian Hacklnder, Prague, Czechoslovakia,

assignor of a part' of the right to The Firm Grodetzky & Polk and Felix Georg Lerk, both of Prague, Czechoslovakia Application July 7, 1933 Seral No. 679,437 In Germany October 24, 1932 11 Claims.

'I'he invention relates to an appliance for cutting out the covers of conserve tins and makes use of the known supporting shield which is placed with its bent over VU-shaped end on the rim of the tin .and in which the tractor wheel which rolls on the rim .of the tin is journalled so as to vbe capable of Abeing turned by means of a handle. The cutter has hitherto been fixed to this supporting shield or been mounted movably thereon. In the former case for/instance `the lower edge of the short limb of the bent U-shaped end of the supporting shield is. made in the f orm of a cutter edge or the cutter forms supporting shield in some other way a tional unit and the tractor wheel is'connectedy to a lever mounted moi/ably on the supporting shield; in the second case the arrangement must be such that the cutter is held in Iits operative positionby. special means, while `the shaft of the tractor wheel is journalled in a fixed bearing on the supporting shield. Consequently the plunging of the cutter into the cover, while the tractor -wheel is at the same time pressed against the rim of the tin, requires atleast a rocking or some other movement of. the cutter or tractor wheel out of its original position, in order to make (it at all possible to place the supporting shield on the rizn of the tin. Apart from this the construction of the appliance becomes so complicated 4through the necessity of providing guiding .means for the cutter or for the tractor wheel, that the appliance cannot be made in "small dimensions.

The invention has for its object to obviate these disadvantages. YIt consists substantially in this, that the supporting shield is not constructionally connected to the cutter and ,can thus be placed without diculty on the rim of the tin and that the cuttenis in the form of an edgeon, vWedge-shaped, tongue-like separate part which can be inserted vwith a sliding t along the inside wall of the rim of' the tin into the' U- construcshaped end of the supporting shield'. By this means the supporting shield is clamped in the radial vand vertical direction against the rim of the tin, the tractor wheel being at the same time pressed against the rim of the tin, lso that, on

the tractor wheel being turned,` the supporting shield moves along the wedging surface'onthe back of the cutter and stabs the latter into the f cover. This relative motion between supporting shield and cutter can continue, until these two parts automatically become hooked one into .the other and consequently 'the knife which has been stabbed into the cover has to take part inv "on the rim of the tin.

With the vrim of the tin.

In the accompanying drawing a constructional example of the appliance is illustrated.

Fig. 1 shows a vertical section of the supporting shield with the tractor wheel placed loosely Fig. 2 a vertical section of the supporting shield clamped by the inserted cutter in the radial and vertical direction against the rim of the tin with 10 the tractor wheel, pressed against the rim of the tin.

' Fig. 3 shows a perspective view of the appliance corresponding to this action, seenirom the cutter side. y

n Fig. 4 shows a similar perspective view with' the supporting shield and the cutter which has already pierced the cover interhooked, vand Fig. 5 isa vertical section corresponding to Fig. 4. 20

The supporting shield 1, in which the shaft of the tractor wheel 2 is journalled, has the known U-shaped bent-over end or flange 3, which is adapted to beloosely placed on the rim ofthe tin (Fig. 1). The cutter is formed as a tongue 4, 25 the thickness of which is made such that, on the cutter being inserted in the end 3 of the supporting shield (Fig. 3), the later is clamped in the radial direction against the rim 5 of the tin, after the tractor wheel 2 bears against the lower 30 ledge of the rim of 'the tin (Fig. 2). The tongue 4 is provided at its lower edge with a projecting, blunt support v6; at a. certain distance from which commences the inclined, upwardly ascending cutting edge 7 of ,i the cutter. On the 35 tongue 4 being -inserted into the end 3 6i the .supporting sh'ield, the latter becomes clamped' to the rim ofthe tin in the 'vertical direction, after thevsupporting shield has, owing to the support?v 6 bearing against the cover 8 been 40 fcoxnes interhooked with the projection 12o! the tongue (Figs. 4 and 5). On the tractor wheel being turned further the cutter which has pierced the cover must,- therefore take part in the motion` and cut out the cover.

t I claim is:

i. An appliance for cutting out the covers of tins, comprising a shield having a ange capable of extending over and around a rim of the tin, a tractor wheel supported in the shield for engagement underisaid rim, a handle for rotating the wheel, a, cutter separate from said shield and adapted to be inserted under the ange and adjacent the inner face of the rim, and means operable yby movement of said shield along the rim and .relatively to the cutter to cause the cutter first to pierce the cover oi the tin and then to become coupled to said shield to participate Jn its further movement on the rim to out the cover out of the tin. .y

2. An appliance for cutting out the covers of tins, comprisingr a shield having a flange capable of extending over andy around a .rim of the tin, a

tractor wheel supported in .the shield for engage l ment under said rim, a handle for rotating the4 wheel. a cutter separate from/said shield and adapted to be inserted under the ange and adjacent the inner face ofthe rim,.an extension on said cutter adapted when the cutter is inserted to clamp the'` rim-oi the tiniboth vertically and transverselybetween said shield and wheel while permitting relative movement between the shield and the cutter longitudinally of the latter, and means operable by such' relative movement to cause the cutter 'rst izo-'pierce the cover oi the tin andthen to become coupled` to said shield to participate in its further movement on the rim to cut the cover outof the tin. y

3. An appliance for cutting out the covers of tins,'comprising a shield having a flange capable of extending over and around a rim of the tin, a tractor wheel supported in the shield for engaging undersaid rim, a handle for rotatingthe- "wheel, a cutter separate from said' shield and adapted tobe inserted under the ange and adjacent the inner face oi' the rim, means operable by movement of said shield along the rixn relatively to the cutter to -cause the cutter to pierce the cover of the tin, and a hook formed on said kcutter for coupling the cutter to the shield at the end of said relative movement. s

4. An appliance for cutting out the covers of.

tins, comprising a shield having a flange capable of extending over and around a rim of the tin, a tractor supported on the shield for engaging under said rim,A a handle for rotating the wheel,v al cutter separate from said shield and adapted to be inserted under the flange and adjacent the inner face of the rim, means operable by movement of said shield along the 'rim and relatively to the cutter to causev the cutter to pierce the cover of the tin, and a blunt projection` onthe, lower side of the means forming a fulcrum about ,which `the cutter tilts wheni piercing the cover'.

( 5. An appliance according to claim 4 in which the projection is integrally connected 'to the cutting edge by an intervening narrower portion of the cutter.

tins, comprising a shield with a flange, a tractor'A wheel mounted therein, and an operating handle; 5

a separate cutting member comprising an oblique cuttingblade. a hook at one end ofsaid blade adapted to engage the flange, an extension at the other end of the blade adapted for insertion under l the ange and adjacent an inner rim face of the `10 tin, a wedging surface on the upper edge of the membercooperatlng with thefiange, andra fulcrum about which the cutting member can tilt during such cooperation. Y l

8. In an appliance for cutting. out the covers of 15 tins, comprising a shield -with'a ang'e, a tractor wheel mounted therein, and an operating handle; a separate cutting member comprising an oblique cutting blade, a hook at one end of s aid blade vadapted to engage the ange, an extension at the `2() other end of the blade adapted for insertion under the ilange and adjacent an inner rim face of the tin,` and a wedging surface on the upper edge of the member cooperating with the flange. i

9. An appliance for cutting out the covers/'of 25.4

tins, 4comprising a shield having a angecapable 'of extending over and around a rim of the tin, a

tractor wheel supported in the shield for engagement under saidrim, a handle for rotating the :wheeL and a cutter separate from said shield'ol and adapted to be inserted under the flange and adjacent the innenface of the rim, said cutterl having integral means`r operable by movement of said shield along the rim and relatively to the cutter to cause the cutter rst to pierce theeover 35 of the tin and then to become coupled to said shield to participate in its further movement on Vthe rimto cut thecover out of the tin.

10. An appliance for cutting out the'coversoitins, comprising a shield having a flange capable 40 vof extending over and around the rim oi a tin,

cover from the tin. 50.

-lLAn appliance for cutting out the covers of tins; comprising a shield having a flange capable of extendingover and around the rin of a tin, means on -the vshield to permit the shield to be manuallyoperated'on the tin, a cutter separate 55- travel ,on the tin, and a hook on the cutter adapt- 605 ed to engage the flange when the cutter cuts the cover from the tin, said cutter with its means and the hook beingcomposed of one integral member.

MAmMnrAN HAcmNDEa. 65

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